I was out bowling with some friends, and the bowling balls were color-coded by weight. 12lb was green, for example, 15lb purple, and yellow was 7 or 8lb, I believe. I immediately thought, “using color hue to encode weight is inappropriate here, as these are ordinal data! An orderable color scheme should be used, such as light to dark green!” This is how bad I have gotten, how deeply ingrained some of these things have become.